Concrete-mixer.



FATENTED JAN. '7, 1908.

R. B. FULTON. CONCRETE MIXER. APPLICATION FILED JAN. 11. 190s.

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No. 876,270. PATENTED JAN. 7, 1908. R. B. FULTON. CONCRETE MIXER.

APPLICATION FILED JAN. 11. 1906.

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A TTOHNE Y S No. 876,270. PATENTED JAN. 7, 1908. R. B. FULTON.

CONCRETE MIXER.

APPLICATION' FILED JAN. 11. 1906.

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ROBERT BARTON FULTON, Or RED CLOUD, NEBRASKA.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed January 11.1906. Serial No. 295.565.

To all whom it may concern:

Be it known that I, .ROBERT B. FULTON, a citizen of the United States,and resident of Red Cloud, in the county of Webster and State ofNebraska, have invented a new and Improved Concrete-Mixer, of which thefollowing is a full, clear, and exact description. My invention relatesto mixing machines,

. it being especially directed to ap aratus for comminglinv theconstituents o concrete. Its principal objects are to rovide a simple,efficient, portable machine or attaining this end. v

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views. Figure 1 is a central, vertical,longitudinal section through one embodiment of my invention; Fig. 2 is aside elevation of the feedend of the machine, vparts being broken away;Fig. 3 is a transverse section on the line 31-3 of Fig. 1 Fig. 4 is an'end elevation looking from the left in Fig. 1, parts being omitted; andFig. 5 is a transverse section on the line 5-5 of Fig. 1.

I provide a main-frame 10 which is prefer'- l ably slightly inclined atits top from one end to the other, and made of angle iron.. 'At thelower portion of the frame is a section 11 pivoted to the main-frame at13. Means for adjusting the angle of the section 11 is provided, itbeing here shown as consisting of a screw 14 oppositely threaded toengage both the mainrame and the movable section. By rotating thisscrew, the section may be either raised or lowered about'its pivotalpoint to retard or facilitate the passage ofthe sodden material in itspassage to the discharge. Rotatably mounted near the extremities of thesection l1 are pairs of separated rolls 15, 15, which serve as supportsfor track-rings 16 and 17 surrounding a mixing cylinder 18. Underneaththe u per end of drum, is a horizontal Wheel 15a olted to main frame,revolving on a short vertical shaft, bringing the periphery of saidwheel into contact with the vertlcal rim of the track-ringl to preventthe drum from gravitating down the incline. Bolted to the track-ring 16is a toothed ring 19, from which a chain 20 extends to a s rocket-wheel21 fast upon a shaft 22. This siiaft is j ournaled in an extension frommainframe and has connected to it ower-applying means, whiclimay be in te form of a crank 23. This enables the shaft to be rotated at thedesired speed and to, in turn, impart its movement to the mixingcylinder.

Rising from the main-frame, beyond the cylinder, is an auxiliary-frame24, u on which are mounted two hoppers 25 andp 26 ada ted to containcement and sand, respective y. These hoppers are located at differentdistances from the receiving end of the cylinder, they being preferablymounted in substantial alinement with its axis, the cement hopper beingfarthest from the cylinder. Each of the hoppers has a contracted throat,

that of the hopper 26 being rovided with aslide 27 by which the area oft 1e opening may be adjusted. 'lhe hopper 25 is shown as having one side28 movable to control the area of the discharge-throat, and to this isconnected a-lever 29 fulcrumed upon the outer casing. The leverpreferably moves over a segment 30, which may be enga ed by detentmechanism 30u and is provi ed with a scale 31, conveniently indicatingratiosexisting between the quantities of cement and sand delivered.Along the bottoms of the hoppers extend troughs 32, through which passesa shaft 33 journaled upon the auxiliary-frame. This shaft carriesconveyers 34 and 35, which, as illustrated, are of the screw type andare situated beneath the hoppers 25 and 26, respectively. The conveyer34 and its associated trough are of less diameter than the similarelements for the hopper 26, this being due not only to the fact that itcustomarily delivers a smaller (uantity of material, but also because itllandles only that falling from its hopper, while the conveyer 35 also oerates upon the material delivered to it by t e conveyer 34. Fixed tothe outer extremity of the shaft 33 is a sprocket-wheel 36, from which achain 37 passes over a sprocketwheel 38 secured upon the shaft 22, thuscausing the rotation of the driving means to be im arted to theconveyers.

ivoted upon the opposite side of the hoper 25 from the controllingmember 28 isla ever 39, which has at its lower extremity an agitatingprojection 40, turned upwardly to enter the hopper-opening. Through thiso ening it plays as the lever oscillates, the

e ge of said opening being referably curved to conform to the arc throug1 which it moves. V

.articulated to the upper end of the lever is a lmk 41, which, at its oposite extremity, is plvoted to an actuating ever 42 fulcrumed upon adepending arm 42, This lever 42 ha's at each` side of its fulcrum a camprojection 43: These are alternately engaged by successive spokes of agear 44 which is fast upon the conveyershaft. Its o eration causes'theac tuatinglever to be rapid yswung in opposite directions as theconveyer-shaft rotates, transmitting its 'motion through the hnk to theagitating lever, the projection of which prevents the contained materialfrom packing in the throat of the hopper 25.

\ Extending across the ho per 26 is a shaft 45 rotatably mounted in t e4opposite walls and having agitating projections 46, which may beconveniently formed by lloo s of bent wire. From the inner end of the saft, outside the hopper, depends an arm or lever 47, 7which hasv at itslower end an angular portion 48. With this arm portion contact revolublearms 49 which project from the inner end of the conve er-shaft. .Aspring 50 forces the arm 47 in t e opiposite direction to a y 52 meshingwith the that invwhich itis move by the arms 49,

thus causing the shaft and its projections to be oscillated in the hoper 26, so that the wet sand contained there y may be stirred and ke tfrom clogging.V This movement is prefera ly slower than that of theagitating .projection 40, since the sand feeds more freely than cement.

Journaled in the auxiliary frame, below the conveyer-shaft, it beingshown as diver ing therefrom toward `rthe cylinder, is a sha t 51, whichhas secured upon it a pinion ear-f 44, both of these elements beingrefera 1y somewhat beveled to provide for te angularity of the shaft 51.To the end of the shaft, adjacent to the cylinder, is fixed a head 53from which ins or churns the descending) projections 54 extend into saidcylin er beneath the inner end of the trough 32. This 54. Throughout thelength of the pipe 58 are comparatively minute p erforations 59, by whicjets the liquid may be'delivered to the material as yit passes throughthe cylinder. Inthe pipe 57 are .valves 60 for controlling 1 the flow"shaft-22B rotated at t om thejet-openings. A v lIn using the apparatusfor the production of concrete, cement is supplied'to thehopper '25 andsand to the hop er 2.6, and the drivinge proper s eed. The

.movement of the agitating mec anisms in -however damp and sticky it maybe, to f a l the hoppers causes the contained material,

through the throats into the conveyers. Here the cement is mingledwiththe fallin sand, thus getting a preliminary mixing, an the material so.combined falls from the trough upon the rapidly rotating projectionsWall ofthe cylinder, further commingling it, while it is Ystill in a drystateD The mixture then passes alongthe cylinder by virtue of theinclination of the latter, this being adment. In this travel it iscarried up the cylinder by its rotation, falling over and over tocomplete the mixture. A At the same time, the water or lother liquidfalling from the pipe 58 is mixed with it, so that when the materialemerges fromthe delivery end of the cylinder it is ready for use. Thelever 29 maybe set u on the'scale to give, for a deiinite area of t oatofthe hop er 26, a predetermined number of parts o cement to the sand,so -that when this setting has once been made, no further attentionneed/be paid to the proportioning, it bein only necessary to keep thehoppers sup lie with the material.

ber has, for convenience, been termed a cylinder, but it will'be evidentthat this need not be of circular section, and the Word is intended tovdesignate any suitable container.

My improved machine contains no com lli-i .54. These throw itoutwardly'against the justed to secure the proper rate of move- Theelement furnis ing the' mixing-chamcated parts, and, if broken, mayberea ily' repaired bytheclass` of laborer usually employed in Work ofthis character. It can be readily moved from lace to place and dis-` todistant oints. v

' The feeding portion of the apparatus is quite distinct from themixing-chamber; and may be applied to existing machines.

shaft having a disk adjacent to the drum at pipe being perforated Withinthe drum, a

-sembled or knocked own for transportation v Aim: Having thus describedmy invention l the upper end thereof, said disk having pins projectingfrom the face thereof and extending into said drum, an auxilia frameconlorf' the drum, a sand hopper and a cement hopper vsu mixer.comprising a main 'frame and inclined with respect thereto, meansforvarying the inclination of the' nected with the main-frame at t e upperend pfported by the auxiliary frame, j means for -eeding Acement andsand in unframe, a drum rotatably supported in the I drum with respectto the frame, a tank supijorted adjacent to the drum, a pipe leadingimmediately above the disk, and means for rotating the drum and thedisk.

3. A concrete mixer comprising a mainframe, a drum rotatably supportedwithin the. frame and inclined with respect thereto, an agitatorcomprising a rotating disk having pins projecting from the face thereofat the end thereof, a sand hopper and a cement hopper delivering tothedrum at the upper end thereof and immediately above the agitator,means for feeding sand and cement. in definite proportions, means formoistening the material during its passage through the drum, and meansengaging the periphery of the drum for rotating the same. y

.4. A concrete. mixer comprising a main frame, a drum rotatablysupported within thel frame and inclined with respect thereto, means forvarying the inclination of the drum, an agitator comprising a rotatingdisk having pins projecting from the face thereof within the drum at theupper end thereof, means for feeding cement and sand in deliniteproportions to the drum, said feeding means delivering immediatelyabove, the agitator, means for lnoistening the material during itspassage through the drum, and means for rotating the drum,

5. A eement mixer, comprising a main fralne, a drum rotatably supportedin the frame aml inclined with respect thereto, means for varying theinclination of the drum with respect to the frame, a gear ring on the.outer surface of the drum, an agitator oomprising a rotating disk havingpins projecting lrom the. face thereof within the drum at the upper endthereof', means for feeding sand and cement in definite proportions tothe drum,

said feeding means delivering immediately above the agitator, mean's formoistening the material during its passage through the drum, and meansengaging the gear ring for rotating the. drum.

(i. A concrete mixer comprising :t main frame, a. drum rotatablysupported within the frame and inclined with respect thereto, anagitator comprising a. rotating disk having pins projecting from theface thereof at the end thereof into said drum, a sand hopper and acement hopper delivering to the drum immediately above the agitator,means for feeding sand and cementl in definite proportions, and meansfor rotating the drm-n.

ln testimony whereof l have signed my name to this specification in thepresence. of two subscribing witnesses.

ROBERT BARTON FUI/VON.

Witnesses:

l). B. SrANoomc, Fimo Mariana.

